using a nas drive with squeezeboxes

hi - hope someone can help!?!?

I have a squeezebox duet, touch & boom which all work well for internet radio/iTunes from a pc around the house (& synchronised as well - great).

in order to develop digital access to my own music (without the pc on) I now wish to access albums stored on a nas (a Seagate central) in flac format

but unsure how to... do I need to install squeezebox server on the nas & if so, how do I & can I achieve this?

any help or advice would be greatly appreciated

thanks very much in anticipation